CN1203449C - Color temp. change device and method for variously changing input picture color temp. - Google Patents
Color temp. change device and method for variously changing input picture color temp. Download PDFInfo
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- CN1203449C CN1203449C CNB02141288XA CN02141288A CN1203449C CN 1203449 C CN1203449 C CN 1203449C CN B02141288X A CNB02141288X A CN B02141288XA CN 02141288 A CN02141288 A CN 02141288A CN 1203449 C CN1203449 C CN 1203449C
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Abstract
A color temperature conversion apparatus has a color temperature detect unit that detects an input color temperature of an input image, a color temperature determine unit that calculates an output color temperature from the input color temperature based on a target color temperature, a coefficient calculate unit that calculates a color temperature conversion coefficient to convert the input color temperature into the output color temperature, and a color temperature conversion unit that converts the input color temperature into the output color temperature. The color temperature determine unit has an output calculate unit that calculates a first target color temperature by summing the input color temperature and an offset value, an output select unit that calculates a second target color temperature corresponding to an address value of database and selects one from the first and second target color temperatures, an output unit that outputs the selected target color temperature to the output select unit, and a mode shift unit that controls the selecting operation of the output select unit.
Description
Technical field
The present invention relates to a kind of color temperature converting means and method thereof, particularly relate to a kind of color temperature converting means and the method thereof that can calculate the output color temperature from the input color temperature of an input picture changeably.The present invention is based on the application number that proposes August 24 calendar year 2001 is the korean patent application of 2001-51268, and this application here is cited as a reference.
Background technology
When a people watched an object, people can feel that usually finding tone changes based on light characteristic.In other words, people can feel that under incandescent lamp the tone of finding an object is generally pale red, and under daylight the tone band blueness of this object.Therefore, in color display system, the color that must will be input to the object of this system is changed into the color of this seen object of people.Usually represented tone relates to color temperature.The term color temperature is meant the temperature of the black matrix that the color of its emission is identical with the color of given light source, and measures with Kelvin (K) (absolute temperature scale (ATS)) unit.If this color temperature height, then this tone band blueness.If this color temperature is low, then this tone is a pale red.
Color display system is used in widely and need sends in the device of visual information to a user.This device comprises that for example a TV, a DTV (Digital Television), a PDP (Plasmia indicating panel), a TFT (thin film transistor (TFT)) monitor, a color printer, a digital camera, a projector, switch phone or the like.In this color display system, color temperature will be adjusted to improve the quality of image.
Color mode comprises RGB (red, green, blue) pattern, Hue, Saturation, Brightness/Hue, Lightness, Saturation (HSB/HLS) pattern, Munsell color system and Commission de l ' Eclairage, or CIE color mode.The CIE color mode is provided with by International Commission on Illumination (international lighting association), and it has stipulated lighting criteria.The CIE color mode comprises color mode CIEXYZ, CIELUV, and CIELAB.The CIEXYZ color mode represents that wherein X, Y, Z are positive sign when X, Y, rgb value when Z is set to different value.Usually, this X, Y, Z are referred to as tristimulus.
A kind of color temperature conversion method of routine is to use the CIEXYZ color mode, in more detail, is a kind of conversion method of using X-axis and Y-axis.
Fig. 1 shows the process flow diagram of this routine color conversion method.
The detailed process of conventional color temperature conversion method is at " the Color Science:concepts and methods; quantitativedata and formulas " that shown by Gunter Wyszecki and W.S.Stiles, nineteen eighty-two the 2nd edition 145-146 page or leaf and the 225-228 page or leaf in existing the description.According to this conventional color temperature conversion method, when an image is imported (S10), calculate the color temperature Tc (S20) of this input picture.Then, calculate spectrum of sunlight (S30) about the color temperature Tc of the input picture that calculated.According to the scope of the color temperature Tc of input picture, by following formula 1) and 2) this spectrum of sunlight calculated.
1) the color temperature Tc of the input picture in 4000K≤Tc＜7000K scope calculates [formula 1] by formula 1
2) the color temperature Tc of the input picture in 7000K≤Tc＜25000K scope calculates [formula 2] by formula 2
The spectral radiant power distribution S of daylight
D(λ) calculate [formula 3] by formula 3
S
D(λ)＝S
0(λ)+M
1S
1(λ)+M
2S
2(λ)
[S wherein
0(λ), S
1(λ), S
2(λ)] corresponding to [s0[31], s1[31], s2[31]], and s0[31], s1[31], s2[31] be fixed value, simultaneously
Calculate the X of Macbeth color checker (MCC), Y, Z (S40).This MCC obtains the X of each passage, Y, Z from following mathematical formulae 4.At this moment, when the scope of a wavelength (λ) was 400nm to 700nm, applied MCC had 31 elements (element).Each element be spaced apart 10nm.[formula 4]
Wherein, i=1,2 ..., 31,
And
Be match colors functional value and
[R[i]]
31 * 31Be the reflection coefficient diagonal matrix of a relevant color channel, and each wavelength range value only exist only in the item on the diagonal line of this matrix.Item on the off-diagonal is zero, and
[E[i]]
31 * 1It is the spectral power chromatic dispersion of brightness.
X
i ME, Y
i ME, and Z
i MEIt is the MCC tristimulus value(s) of the color temperature Tc of relevant input picture.
The X of the MCC of select target color temperature, Y, Z (S50).
According to following formula 5, use the color temperature Tc of input picture and the relation of object color component temperature to calculate transition matrix (S60).
[formula 5]
[TM]
3×3＝[(XYZ)
MT]
-1 3×24[(XYZ)
ME]
3×24
Wherein, [TM]
3 * 3Be transition matrix, and
[(XYZ)
MT]
-1 3 * 24Be the MCC tristimulus value(s) X of relevant object color component temperature, Y, the matrix of Z and
[(XYZ)
ME]
3 * 24Be the MCC tristimulus value(s) X of the color temperature Tc of relevant input picture, Y, the matrix of Z.
Input picture is converted into the image (S70) of object color component temperature.In other words, by using this input picture of transition matrix that is calculated to be converted into the image of an object brightness.
[formula 6]
System wherein, X
t, Y
tAnd Z
tBe according to the tristimulus element of object color component temperature and
[TM] be transition matrix and
X, Y and Z are the tristimulus elements according to the color temperature TC of input picture.
As mentioned above, convert the image output (S80) of object color component temperature to each colour display device.
As mentioned above, in this conventional color temperature conversion method, the tristimulus value(s) X of the MCC of the color temperature Tc of relevant input picture, Y, the tristimulus value(s) X of Z and relevant object color component temperature, Y, Z will be calculated to draw the color temperature transition matrix.Realize that the required hardware matrix quantity of this routine color temperature conversion method is as shown in table 1.
[table 1]
| Matrix-type | Matrix quantity |
| 31×1 | 3 |
| 24×31 | 1 |
| 3×31 | 1 |
| 24×3 | 1 |
In addition, need matrix inversion part to obtain this transition matrix.In addition, in order to calculate above-mentioned formula needs multiplication and division arithmetic repeatedly.Therefore, use the problem of conventional color Tc conversion method low practicality of meeting generation on size and cost of this hardware.
Simultaneously, when showing a screen,, therefore can not guarantee to obtain meticulous adjustment to the color temperature of a frame because should routine color temperature conversion equipment one frame of input picture be converted to a fixed target temperature that presets.
Summary of the invention
The present invention is the above-mentioned shortcoming that will overcome prior art.Therefore, an object of the present invention is to provide a kind of color temperature conversion equipment that an input color temperature can be converted to another color temperature.
Another object of the present invention provides a kind of color converting device that is easy to realize in hardware level.
A further object of the present invention provide a kind of can be according to different input color temperatures being converted to the color temperature conversion equipment of other color conversion temperature with the proportional output color temperature that calculates of input picture.
According to the present invention, can obtain best picture quality by calculating the color temperature of changing changeably from the input color temperature of an input picture.
Description of drawings
From will make above-mentioned purpose and feature of the present invention become clearer below in conjunction with the accompanying drawing description of a preferred embodiment with other.
The process flow diagram of Fig. 1 shows a kind of color temperature conversion method of routine;
The block diagram of Fig. 2 shows a kind of according to the color temperature conversion equipment that is used to obtain a color temperature transition coefficient of the present invention;
The block diagram of Fig. 3 shows in detail the color temperature determining unit of Fig. 2;
The process flow diagram of Fig. 4 shows the method that is used to obtain the color temperature conversion coefficient according to of the present invention;
The block diagram of Fig. 5 shows the color temperature calculation element of use according to conversion coefficient calculation element of the present invention; With
The process flow diagram of Fig. 6 shows the color temperature conversion method of use according to color temperature conversion equipment of the present invention.
Embodiment
The preferred embodiments of the present invention are described now in conjunction with the accompanying drawings.
The block diagram of Fig. 2 shows a kind of according to the color temperature conversion equipment that is used to obtain a color temperature transition coefficient of the present invention;
As shown in Figure 2, this color temperature conversion equipment has first conversion coefficient unit 120, the second conversion coefficient unit 130, conversion coefficient computing unit 140 and the color temperature determining unit 110.
The first conversion coefficient unit 120 calculates the first coefficient C1 and was converted to a certain color temperature Tp should import color temperature Ti.The second conversion coefficient unit 130 calculates the second coefficient C2 being converted to output color temperature To by a certain color temperature Tp.According to a preferred embodiment of the invention, the first and second coefficient C1 and C2 predesignate.Conversion coefficient computing unit 140 was converted to output color temperature To by using the first coefficient C1 and the second coefficient C2 calculating tertiary system to count C3 should import color temperature Ti.Simultaneously, color temperature determining unit 110 is selected output color temperature To changeably from the target temperature of input color temperature Ti and input color temperature Ti, and exports selected output color temperature To.
Preferably, this object color component temperature is off-set value A2, and this off-set value A2 is the two a variable of the address value A1 of database (not shown) of target temperature of storage input color temperature conversion and input color temperature Ti.According to the object color component temperature that is input to color temperature determining unit 110, input color temperature Ti is converted into output color temperature To, and outputs to the second conversion coefficient unit 130.
The block diagram of Fig. 3 at length shows color temperature determining unit 110.This color temperature determining unit 110 has output color temperature computing unit 112, output color temperature selected cell 114, output color temperature output unit 118 and output mode switch unit 116.Output color temperature computing unit 112 calculates the first object color component temperature by the off-set value A2 summation to input color temperature Ti and object color component temperature.Export the second object color component temperature that color temperature selected cell 114 calculates corresponding to the address value A1 of target temperature, and export one that from the first object color component temperature and the second object color component temperature, selects according to the select command signal.The object color component temperature that output color temperature output unit 118 will be selected in output color temperature selected cell 114 outputs to the second conversion coefficient unit 130.An output color temperature selected cell 114 of exporting is selected in 116 controls of output mode switch unit from the first and second object color component temperature.In output mode switch unit 116, when this pattern is like this during a kind of pattern, the color temperature that is selected output is when off-set value being added to the color temperature of input picture with the proportional variable of color temperature input picture, preferably selects the first object color component temperature.When this pattern is like this during a kind of pattern, promptly by importing that color temperature is converted to predetermined fixed target color temperature and during the export target temperature, preferably select the second object color component temperature.
The process flow diagram of Fig. 4 shows the method that is used to obtain the color temperature conversion coefficient according to of the present invention.
At first, according to the selection information of being made by the user, color temperature determining unit 110 determines to select the output color should be and the proportional variable of input color temperature, or this output color temperature should be fixed to a certain object color component temperature (step S110).If should selection information indicate the output color temperature is proportional with the input color temperature, then to variable output color temperature pattern, control output color temperature selected cell 114 is to select from the first object color component temperature of output color temperature computing unit 112 outputs as object color component temperature (step S120) accordingly with this mode switch for output mode switch unit 116.At this moment, output color temperature computing unit 112 is added to input color temperature Ti by the off-set value A2 with the object color component temperature and calculates the first object color component temperature (step S130).According to the pattern of switching in S120, the first object color component temperature that output color temperature output unit 118 will calculate in S130 outputs in the second conversion coefficient unit 130.
If selected pattern is used for fixing the object color component temperature in S110, then output mode switch unit 116 switches to fixed target color temperature output mode and control output color temperature selected cell 114 (step S140).The second object color component temperature (step S150) that output color temperature selected cell 114 calculates corresponding to the address value A1 of object color component temperature.According to the pattern of switching in S140, output color temperature selected cell 114 also outputs to the second object color component temperature of being calculated in the second conversion coefficient unit 130.
Simultaneously, the first conversion coefficient unit 120 calculates the first coefficient C1 and was converted to a certain color temperature Tp (step S160) should import color temperature Ti.In addition, the second conversion coefficient unit 130 calculates the second coefficient C2 being converted to output color temperature To by a certain color temperature Tp, and output color temperature To selects (step S170) from the first object color component temperature and the second object color component temperature.Conversion coefficient computing unit 140 uses the first coefficient C1 and the second coefficient C2 that is calculated, and the calculating tertiary system is counted C3 and was converted to output color temperature To (step S180) should import color temperature Ti.
The block diagram of Fig. 5 shows the color temperature calculation element according to image display system of the present invention.In description, will omit being similar to the description of the same parts in Fig. 2 and 3 to Fig. 5.
Referring to Fig. 5, this color temperature calculation element comprises color temperature detecting unit 200, color temperature conversion coefficient computing unit 100 and color temperature converting unit 300.The input color temperature Ti that color temperature detecting unit 200 detects from input picture.Color temperature conversion coefficient computing unit 100 comprises color temperature determining unit 110 and conversion coefficient computing unit 120,130,140.Color temperature determining unit 110 is selected output color temperature To changeably from the object color component temperature of input color temperature Ti and input color temperature Ti, and exports this output color temperature To.Conversion coefficient computing unit 120,130,140 calculates input color temperature Ti and certain conversion coefficient was converted to output color temperature To should import color temperature Ti.Color temperature converting unit 300 is used the color temperature conversion coefficient that is calculated by conversion coefficient computing unit 120,130,140, will import color temperature Ti and be converted to output color temperature To.
Therefore, obtain the input picture that its input color temperature is suitably changed.After conversion, this image can be displayed on the image display device.In addition, if this image is a live image, then this color temperature calculates by off-set value according to the object color component temperature, thereby this input picture can be converted into the optimum color temperature.Therefore, color temperature can change according to this live image.
The process flow diagram of Fig. 6 shows the color temperature conversion method of use according to color temperature conversion equipment of the present invention.
Referring to Fig. 6, at first, detect the input color temperature Ti (step S310) of input picture.Then, color temperature determining unit 110 is from input color temperature Ti and object color component temperature computation variable output color temperature To (step S320).The first conversion coefficient unit 120 calculates the first coefficient C1 and is converted to certain color temperature Tp (step S330) will import color temperature Ti.The second conversion coefficient unit 130 calculates the second coefficient C2 certain color temperature Tp is converted to from the output color temperature (step S340) of the first object color component temperature or the output of the second object color component temperature.Multiply each other by the first and second coefficient C1 and the C2 that will be calculated, the conversion coefficient computing unit 140 calculating tertiary systems are counted C3 and are converted to output color temperature To (step S350) will import color temperature Ti.Count C3 and input picture multiplies each other by the tertiary system of being calculated that will obtain in step S350, color temperature converting unit 300 will be imported color temperature Ti and be converted to output color temperature To (step S360).When input color temperature Ti was converted into output color temperature To, input picture became the output image according to color temperature conversion equipment of the present invention.The output image of being changed is shown by the display unit (not shown).
Color temperature conversion equipment and method can be applied to common image display system and method thereof according to the preferred embodiment of the invention.
According to the present invention, the color temperature of suitably changing from the input color temperature of input picture is output.Thereby, guaranteed the optimum picture quality of this input picture.In addition, according to the present invention, calculate the color temperature coefficient by the off-set value according to the object color component temperature, the input color temperature of institute's input picture is converted to the color temperature that is best suited for moving image changeably.Therefore, reduced the complexity of hardware, feasible practical more, useful and widespread use.
Though the present invention is described with reference to preferred embodiment, be to be understood that those of ordinary skill in the art under the prerequisite by the spirit and scope of the present invention of claim defined, can do various changes to form of the present invention and details.
Claims (22)
1. device that is used to calculate the color temperature conversion coefficient comprises:
The first conversion coefficient unit is used to calculate first conversion coefficient and is converted to the specific color temperature with the input color temperature with an input picture;
The color temperature determining unit is used to receive the output color temperature that is used to import the object color component temperature of color temperature and is used for the output of this input color temperature according to this object color component temperature computation;
The second conversion coefficient unit is used to calculate second conversion coefficient with the specific color temperature transition to serve as the output color temperature; With
The conversion coefficient computing unit is used for calculating the 3rd conversion coefficient according to first and second conversion coefficients and is converted to the output color temperature will import color temperature.
2. the device that is used to calculate the color temperature conversion coefficient as claimed in claim 1, wherein this object color component temperature comprises:
One is stored in the database and corresponding to the address value of the object color component temperature of the conversion that is used to import color temperature; With
One or more off-set values that are used to import the conversion of color temperature.
3. the device that is used to calculate the color temperature conversion coefficient as claimed in claim 2, wherein this color temperature determining unit comprises:
The output computing unit is used for calculating the first object color component temperature by this off-set value being added to the input color temperature; With
Output select unit is used to calculate and selects an object color component temperature corresponding to the second object color component temperature of this address value with from the first object color component temperature and the second object color component temperature.
4. the device that is used to calculate the color temperature conversion coefficient as claimed in claim 3, wherein this color temperature determining unit comprises the color temperature output unit that is used for exporting in the selected first object color component temperature of output select unit or the second object color component temperature.
5. the device that is used to calculate the color temperature conversion coefficient as claimed in claim 3, wherein this color temperature determining unit comprises according to the mode switch element that is used to control the selection operation of output select unit by a user-selected pattern.
6. the device that is used to calculate the color temperature conversion coefficient as claimed in claim 5, wherein to select be that the output one made by the user is during with the proportional output color temperature of input color temperature variable when one, this mode switch element control this output select unit select the first object color component temperature and
When one selected to be this object color component temperature of output of being made by the user, this mode switch element was controlled this output select unit and is selected the second object color component temperature.
7. color temperature conversion equipment comprises:
The color temperature detecting unit is used to detect the input color temperature of an input picture;
The color temperature determining unit, be used to receive the object color component temperature that is used to import color temperature and according to this object color component temperature computation output color temperature to export this input color temperature;
Coefficient calculation unit is used to calculate a color temperature transition coefficient and is converted to the output color temperature will import color temperature; With
The color temperature converting unit is used for should importing color temperature according to this color temperature conversion coefficient and is converted to the output color temperature.
8. color temperature conversion equipment as claimed in claim 7, wherein this object color component temperature comprises:
One is stored in the database and corresponding to the address value of the object color component temperature of the conversion that is used to import color temperature; With
One or more off-set values that are used to import the conversion of color temperature.
9. color temperature conversion equipment as claimed in claim 8, wherein this color temperature determines that device comprises:
The output computing unit is used for calculating the first object color component temperature by this off-set value being added to the input color temperature; With
Output select unit is used to calculate corresponding to the second object color component temperature of this address value and selects the first object color component temperature or the second object color component temperature.
10. color temperature conversion equipment as claimed in claim 9, wherein this color temperature determining unit comprises the color temperature output unit that is used to export by the selected first object color component temperature of output select unit or the second object color component temperature.
11. color temperature conversion equipment as claimed in claim 10, wherein this color temperature determining unit comprises according to the mode switch element that is used to control the selection operation of output select unit by a user-selected pattern.
12. color temperature conversion equipment as claimed in claim 10, wherein to select be that the output one made by the user is during with the proportional output color temperature of input color temperature variable when one, this mode switch element control this output select unit select the first object color component temperature and
When one selected to be this object color component temperature of output of being made by the user, this mode switch element was controlled this output select unit and is selected the second object color component temperature.
13. color temperature conversion equipment as claimed in claim 12, wherein this coefficient calculation unit comprises:
The first conversion coefficient unit is used to calculate first conversion coefficient and is converted to the specific color temperature will import color temperature;
The second conversion coefficient unit is used to calculate second conversion coefficient with the specific color temperature transition to serve as the output color temperature; With
The conversion coefficient computing unit is used for being converted to the output color temperature according to first conversion coefficient and second conversion coefficient calculating color temperature conversion coefficient will import color temperature.
14. a color temperature conversion method includes step:
Detect the input color temperature of an input picture;
Object color component temperature computation according to input color temperature and input color temperature is exported color temperature to export this input color temperature, wherein this object color component temperature comprises and is stored in the database and is used to import the variable offset value of the conversion of color temperature corresponding to the address value of the object color component temperature of the conversion that is used to import color temperature and at least one, and the calculating of output color temperature comprises:
Calculate the first object color component temperature by at least one variable offset value being added to the input color temperature;
Calculating is corresponding to the second object color component temperature of this address value, and selects arbitrary object color component temperature of the first object color component temperature or the second object color component temperature; And
Export in the selected first object color component temperature and the second object color component temperature one as the object color component temperature;
Calculate the color temperature conversion coefficient and be converted to the output color temperature should import color temperature, wherein the calculating of color temperature conversion coefficient comprises:
Calculate first conversion coefficient and be converted to the specific color temperature should import color temperature;
Calculate second conversion coefficient with this specific color temperature transition to serve as the output color temperature; And
Be converted to the output color temperature according to first conversion coefficient and second conversion coefficient calculating color temperature conversion coefficient should import color temperature;
To import color temperature according to this color temperature conversion coefficient and be converted to the output color temperature.
15. color temperature conversion method as claimed in claim 14 also comprised the step of selecting and exporting one output mode in the first object color component temperature and the second object color component temperature is set before selecting step.
16. color temperature conversion method as claimed in claim 15 wherein, is provided with in the step in this pattern, to select be the output one made by the user during with the proportional output color temperature of input color temperature variable when one, select the first object color component temperature and
When one selects to be this object color component temperature of output of being made by the user, select the second object color component temperature.
17. an image display system comprises:
The color temperature detecting unit is used to detect the input color temperature of an input picture;
The color temperature determining unit is used for calculating an output color temperature according to the object color component variable temperatures ground of the input color temperature after this input color temperature and the conversion;
Coefficient calculation unit is used to calculate a color temperature transition coefficient and is converted to the output color temperature will import color temperature;
The color temperature converting unit is used for should importing color temperature according to this color temperature conversion coefficient and is converted to the output color temperature; With
Display unit is used to show the image of the color temperature of being changed.
18. image display system as claimed in claim 17, wherein this object color component temperature comprises:
One is stored in the database and corresponding to the address value of the object color component temperature of the conversion that is used to import color temperature; With
At least one is used to import the variable offset value of the conversion of color temperature.
19. image display system as claimed in claim 18, wherein this color temperature determining unit comprises:
Computing unit is used for calculating the first object color component temperature by at least one off-set value being added to the input color temperature;
Selected cell is used to calculate the second object color component temperature corresponding to this address value, and selects one as the object color component temperature from the first object color component temperature and the second object color component temperature;
Output unit is used for exporting by the selected first object color component temperature of this selected cell and the second object color component temperature; With
Mode switch element is used for according to the selection operation of being controlled this selected cell by the pattern of user's selection.
20. image display system as claimed in claim 19, wherein to select be that the output one made by the user is during with the proportional output color temperature of input color temperature variable when one, this mode switch element control this output select unit select the first object color component temperature and
When one selects to be this object color component temperature of output of being made by the user, control this output select unit and select the second object color component temperature.
21. a method for displaying image includes step:
Detect the input color temperature of an input picture;
Export color temperature to export this input color temperature according to the object color component temperature computation one after the conversion of input color temperature and input color temperature, wherein this object color component temperature comprises and is stored in the database and is used to import the variable offset value of the conversion of color temperature corresponding to the address value of the object color component temperature of the conversion that is used to import color temperature and at least one, and the calculating of output color temperature comprises:
Calculate the first object color component temperature by this off-set value being added to the input color temperature;
Calculating is corresponding to the second object color component temperature of this address value, switches from corresponding to selecting one output mode the first object color component temperature of this address value and the second object color component temperature;
From the first object color component temperature and the second object color component temperature, select one as the object color component temperature according to this output mode; And
Export in the first object color component temperature and the second object color component temperature one as the object color component temperature;
Calculate the color temperature conversion coefficient and be converted to the output color temperature will import color temperature;
Should import color temperature according to this color temperature conversion coefficient and be converted to the output color temperature; With
The image that shows the output color temperature that is converted.
22. method for displaying image as claimed in claim 21, wherein to select be the output one made by the user during with the proportional output color temperature of input color temperature variable when one, this output mode select the first object color component temperature and
When one selected to be this object color component temperature of output of being made by the user, this output preference pattern was selected the second object color component temperature.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR10-2001-0051268A KR100406934B1 (en) | 2001-08-24 | 2001-08-24 | Apparatus and method for transformation of color temperature capable of calculate variable output image according to input image |
| KR51268/2001 | 2001-08-24 |
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| Publication Number | Publication Date |
|---|---|
| CN1402188A CN1402188A (en) | 2003-03-12 |
| CN1203449C true CN1203449C (en) | 2005-05-25 |
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|---|---|---|---|
| CNB02141288XA Expired - Fee Related CN1203449C (en) | 2001-08-24 | 2002-07-05 | Color temp. change device and method for variously changing input picture color temp. |
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| Country | Link |
|---|---|
| US (1) | US7035455B2 (en) |
| KR (1) | KR100406934B1 (en) |
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| KR100612831B1 (en) * | 2002-04-25 | 2006-08-18 | 삼성전자주식회사 | A method for color temperature conversion in image displaying device using contents description metadata of visual contents, and system using thereof |
| TWI260569B (en) * | 2003-01-29 | 2006-08-21 | Chunghwa Picture Tubes Ltd | Plasma display panel with color space transformation device |
| JP4343752B2 (en) * | 2004-03-31 | 2009-10-14 | キヤノン株式会社 | Color processing apparatus and method |
| JP4721398B2 (en) * | 2004-03-31 | 2011-07-13 | キヤノン株式会社 | Color processing apparatus and method |
| KR20050105401A (en) * | 2004-05-01 | 2005-11-04 | 삼성전자주식회사 | Display apparatus |
| US20070133867A1 (en) * | 2005-12-14 | 2007-06-14 | Samsung Electronics., Ltd. | Apparatus and method of adaptively converting image in image display system |
| JP2009071548A (en) * | 2007-09-12 | 2009-04-02 | Canon Inc | Color processing device and method therefor |
| US8483479B2 (en) * | 2009-05-11 | 2013-07-09 | Dolby Laboratories Licensing Corporation | Light detection, color appearance models, and modifying dynamic range for image display |
| JP6544266B2 (en) * | 2016-02-25 | 2019-07-17 | コニカミノルタ株式会社 | Image forming apparatus and program |
| CN110049302B (en) * | 2019-04-11 | 2021-06-01 | 深圳康佳电子科技有限公司 | Television terminal automatic white balance debugging processing method, television terminal and storage medium |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH03214990A (en) * | 1990-01-19 | 1991-09-20 | Nippon Philips Kk | Color image pickup device |
| KR100335618B1 (en) * | 1995-11-21 | 2002-10-31 | 삼성전자 주식회사 | Color display device having color temperature conversion function and method of changing color temperature |
| KR19990026076A (en) * | 1997-09-22 | 1999-04-15 | 구자홍 | How to save color monitor automatically and switch colors automatically |
| KR100260885B1 (en) * | 1998-03-09 | 2000-07-01 | 윤종용 | Control apparatus for color temperature of display system |
| JP3072729B2 (en) * | 1998-10-09 | 2000-08-07 | 日本電気株式会社 | Color matching method, color matching device, and machine-readable recording medium recording program |
| KR100311075B1 (en) * | 1999-11-15 | 2001-11-14 | 윤종용 | Apparatus for estimating and converting illuminant chromaticity by using perceived illumination and highlight and method therefor |
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2001
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| CN1402188A (en) | 2003-03-12 |
| US20030063799A1 (en) | 2003-04-03 |
| KR100406934B1 (en) | 2003-11-21 |
| KR20030017126A (en) | 2003-03-03 |
| US7035455B2 (en) | 2006-04-25 |
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